$42 zip is the old dissasembly that has been around a long time.

daleulan has donated the ARJT.zip folder.

All the others were done by jimindorris. :thumbsup:
The folders ending in 3 have the...

Here is a data log file for people to use in TunerPro for the Start Up Tutorial.

Dave W from Old School EFI has made a spreadsheet to help get fueling correct when tuning an engine. You enter your current VE table, your recorded BLM from BLM historygram setup in TunerPro...

To enable Highway Lean Cruise check out the How To at:
http://www.gearhead-efi.com/Fuel-Injection/showthread.php?351-Enable-Highway-Cruise-on-1227747-ECM

More bins

Bin Files for 1227747 ECM.

These are known good bin files with no recalls from GM. There are many BCC/Chip bin files all over the internet that have been recalled by GM and updated. Why start with...

TunerPro definitions for $42 1227747 ECM 1987 - 91 C/K Truck, Van, 4.3L, 5.7L, 5.0L & 7.4L

$42-1227747-V4 (and up) .xdf and $42-1227747-V3.adx are advanced files with Data Tracing for TunerPro V5...

1227747 Wiring diagrams $42 ECM. New Diagrams updated 3-12-2012

1227747 ECM Information $42

This ECM was used in 1987 to 1991 C/K Truck, Van, 4.3L, 5.7L, 5.0L & 7.4L engines.
$42 Mask

Click here for details on how to read error codes known as Check Engine...